tests/cache_test: allow crossing mount points

When using an overlayfs system (like a Docker container), rmrf_local()
fails because part of the files to be removed are in different mount
points (layouts). And thus cache-test fails.

Letting crossing mount points is not a big problem, specially because
this is just for a test, not to be used in real code.

Reviewed-by: Nicolai Hähnle <nicolai.haehnle@amd.com>
(cherry picked from commit caa616ccc4384ea1479865e12b56cf816561a827)
diff --git a/src/compiler/glsl/tests/cache_test.c b/src/compiler/glsl/tests/cache_test.c
index 0ef05aa..efe4a9b 100644
--- a/src/compiler/glsl/tests/cache_test.c
+++ b/src/compiler/glsl/tests/cache_test.c
@@ -111,7 +111,7 @@
    if (path == NULL || *path == '\0' || *path != '.')
       return -1;
 
-   return nftw(path, remove_entry, 64, FTW_DEPTH | FTW_PHYS | FTW_MOUNT);
+   return nftw(path, remove_entry, 64, FTW_DEPTH | FTW_PHYS);
 }
 
 #define CACHE_TEST_TMP "./cache-test-tmp"